A guy in our area has the same wording on his web-site.
I put out a flyer about 2 years ago with L/RM & H,S,L carpet cleaned then get the smallest bedroom cleaned free aslo spoke to customers about maintanance, ie get traffic lanes cleaned at reduced cost every 6 months.
But a limited number went for it.
The guy up this way wants you to pay £12 per mnth to get this maintanance, dont know how much people have taken this up?